S. Allebrod, R. Hamerski, and R. Marquardt, "New transformerless, scalable modular multilevel converters for HVDC-transmission," in Power Electronics Specialists Conference, PESC 2008. IEEE, pp. 174-179, 2008.
A. Lesnicar and R. Marquardt, "An innovative modular multilevel converter topology suitable for a wide power range," in Power Tech Conference Proceedings, 2003 IEEE Bologna, Vol. 3, pp. 6, 2003.
P. Murphy, M. Xie, Y. Li, M. Ferdowsi, N. Patel, and F. Fatehi, et al., "Study of digital vs analog control," in Power Electronics Seminar Proceedings(CPES Center for Power Electronics Systems), pp. 203-206, 2002.
Q. R. Tu, Z. Xu, and L. Xu, "Reduced switching-frequency modulation and circulating current suppression for modular multilevel converters," IEEE Transactions on Power Delivery, Vol. 26, pp. 2009-2017, Jul. 2011.
M. Guan, Z. Xu, and H. Chen, "Control and modulation strategies for modular multilevel converter based HVDC system," in IECON 2011-37th Annual Conference on IEEE Industrial Electronics Society, pp. 849-854, 2011.
G. F. Franklin, J. D. Powell, A. Emami-Naeini, and J. D. Powell, Feedback control of dynamic systems Vol. 3: Addison-Wesley Reading, 1994.
R. C. Dorf, Modern control systems: Addison-Wesley Longman Publishing Co., Inc., 1995.
G. F. Franklin, M. L. Workman, and D. Powell, Digital control of dynamic systems: Addison-Wesley Longman Publishing Co., Inc., 1997.
T. Qingrui, X. Zheng, H. Hongyang, and Z. Jing, "Parameter design principle of the arm inductor in modular multilevel converter based HVDC," in Power System Technology (POWERCON), 2010 International Conference on, pp. 1-6, 2010.
S. Zhandong, Y. H. Li, P. Wang, Z. X. Li, Y. J. Luo, and P. Qu, "Parameter design principle of the capacitors and inductors in the power electronic transformer based on MMC," in Electrical Machines and Systems (ICEMS), 2014 17th International Conference on, pp. 2445-2448, 2014.
Q. Tu and Z. Xu, "Impact of sampling frequency on harmonic distortion for modular multilevel converter," IEEE Transactions on Power Delivery, Vol. 26, pp. 298-306, 2011.